222105321 has 10 divisors (see below), whose sum is σ = 331787082. Its totient is φ = 148070160.

The previous prime is 222105313. The next prime is 222105337. The reversal of 222105321 is 123501222.

It can be written as a sum of positive squares in only one way, i.e., 217857600 + 4247721 = 14760^2 + 2061^2 .

It is not a de Polignac number, because 222105321 - 2³ = 222105313 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 222105294 and 222105303.

It is not an unprimeable number, because it can be changed into a prime (222105371) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 1370940 + ... + 1371101.

Almost surely, 2^222105321 is an apocalyptic number.

It is an amenable number.

222105321 is a deficient number, since it is larger than the sum of its proper divisors (109681761).

222105321 is an equidigital number, since it uses as much as digits as its factorization.

222105321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2742053 (or 2742044 counting only the distinct ones).

The product of its (nonzero) digits is 240, while the sum is 18.

The square root of 222105321 is about 14903.1983480057. The cubic root of 222105321 is about 605.6006338384.

Adding to 222105321 its reverse (123501222), we get a palindrome (345606543).

The spelling of 222105321 in words is "two hundred twenty-two million, one hundred five thousand, three hundred twenty-one".